431187131 has 2 divisors, whose sum is σ = 431187132. Its totient is φ = 431187130.

The previous prime is 431187089. The next prime is 431187137. The reversal of 431187131 is 131781134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 431187131 - 2²² = 426992827 is a prime.

It is a super-2 number, since 2×431187131² = 371844683880022322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 431187094 and 431187103.

It is not a weakly prime, because it can be changed into another prime (431187137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215593565 + 215593566.

It is an arithmetic number, because the mean of its divisors is an integer number (215593566).

Almost surely, 2^431187131 is an apocalyptic number.

431187131 is a deficient number, since it is larger than the sum of its proper divisors (1).

431187131 is an equidigital number, since it uses as much as digits as its factorization.

431187131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 431187131 is about 20765.0458944834. The cubic root of 431187131 is about 755.4781883639.

The spelling of 431187131 in words is "four hundred thirty-one million, one hundred eighty-seven thousand, one hundred thirty-one".